<template>
  <div>
    <p v-if="msTime.show">
      <!-- <span v-if="tipShow">{{tipText}}:</span> -->
      <!--<span v-if="!tipShow">{{tipTextEnd}}:</span>-->
      <span style="color: #2d8cf0;"
            v-if="msTime.day>0">
        <span>{{msTime.day}}</span>
        <i>{{dayTxt}}</i>
      </span>
      <span style="color: #2d8cf0;">{{msTime.hour}}</span>
      <i>{{hourTxt}}</i>
      <span style="color: #2d8cf0;">{{msTime.minutes}}</span>
      <i>{{minutesTxt}}</i>
      <span style="color: #2d8cf0;">{{msTime.seconds}}</span>
      <i>{{secondsTxt}}</i>
    </p>
    <p style="color: #f90;"
       v-if="!msTime.show">{{endText}}</p>
  </div>
</template>
<script>
export default {
  name: 'ocCountdown',
  replace: true,
  data () {
    return {
      tipShow: true,
      msTime: { // 倒计时数值
        show: false, // 倒计时状态
        day: '', // 天
        hour: '', // 小时
        minutes: '', // 分钟
        seconds: '' // 秒
      },
      star: '', // 活动开始时间
      end: '', // 活动结束时间
      current: '' // 当前时间
    }
  },
  watch: {
    currentTime: function (val, oldval) {
      this.gogogo()
    },
    startTime: function (val, oldval) {
      this.gogogo()
    }
  },
  props: {
    // 距离开始提示文字
    tipText: {
      type: String,
      default: '距离开始'
    },
    // 距离结束提示文字
    tipTextEnd: {
      type: String,
      default: '距离结束'
    },
    // 时间控件ID
    id: {
      type: String,
      default: '1'
    },
    // 当前时间
    currentTime: {
      type: Number
    },
    // 活动开始时间
    startTime: {
      type: Number
    },
    // 活动结束时间
    endTime: {
      type: Number
    },
    // 倒计时结束显示文本
    endText: {
      type: String,
      default: '已结束'
    },
    // 自定义显示文字:天
    dayTxt: {
      type: String,
      default: ':'
    },
    // 自定义显示文字:时
    hourTxt: {
      type: String,
      default: ':'
    },
    // 自定义显示文字:分
    minutesTxt: {
      type: String,
      default: ':'
    },
    secondsTxt: {
      type: String,
      default: ':'
    },
    // 是否开启秒表倒计，未完成
    secondsFixed: {
      type: Boolean,
      default: false
    }
  },
  mounted () {
    this.gogogo()
  },
  methods: {
    gogogo: function () {
      // 判断是秒还是毫秒
      this.startTime.toString().length === 10 ? this.star = this.startTime * 1000 : this.star = this.startTime
      this.endTime.toString().length === 10 ? this.end = this.endTime * 1000 : this.end = this.endTime
      if (this.currentTime) {
        this.currentTime.toString().length === 10 ? this.current = this.currentTime * 1000 : this.current = this.currentTime
      } else {
        this.current = (new Date()).getTime()
      }

      if (this.end < this.current) {
        /**
         * 结束时间小于当前时间 活动已结束
         */
        this.msTime.show = false
        this.end_message()
      } else if (this.current < this.star) {
        /**
         * 当前时间小于开始时间 活动尚未开始
         */
        this.$set(this, 'tipShow', true)
        setTimeout(() => {
          this.runTime(this.star, this.current, this.start_message)
        }, 1)
      } else if ((this.end > this.current && this.star < this.current) || this.star === this.current) {
        /**
         * 结束时间大于当前并且开始时间小于当前时间，执行活动开始倒计时
         */
        this.$set(this, 'tipShow', false)
        this.msTime.show = true
        this.$emit('start_callback', this.msTime.show)
        setTimeout(() => {
          this.runTime(this.end, this.star, this.end_message, true)
        }, 1)
      }
    },
    runTime (startTime, endTime, callFun, type) {
      let msTime = this.msTime
      let timeDistance = startTime - endTime
      if (timeDistance > 0) {
        this.msTime.show = true
        msTime.day = Math.floor(timeDistance / 86400000)
        timeDistance -= msTime.day * 86400000
        msTime.hour = Math.floor(timeDistance / 3600000)
        timeDistance -= msTime.hour * 3600000
        msTime.minutes = Math.floor(timeDistance / 60000)
        timeDistance -= msTime.minutes * 60000
        // 是否开启秒表倒计,未完成
        // this.secondsFixed ? msTime.seconds = new Number(timeDistance / 1000).toFixed(2) : msTime.seconds = Math.floor( timeDistance / 1000 ).toFixed(0)
        msTime.seconds = Math.floor(timeDistance / 1000).toFixed(0)
        timeDistance -= msTime.seconds * 1000

        if (msTime.hour < 10) {
          msTime.hour = '0' + msTime.hour
        }
        if (msTime.minutes < 10) {
          msTime.minutes = '0' + msTime.minutes
        }
        if (msTime.seconds < 10) {
          msTime.seconds = '0' + msTime.seconds
        }
        let _s = Date.now()
        let _e = Date.now()
        let diffPerFunc = _e - _s
        setTimeout(() => {
          if (type) {
            this.runTime(this.end, endTime += 1000, callFun, true)
          } else {
            this.runTime(this.star, endTime += 1000, callFun)
          }
        }, 1000 - diffPerFunc)
      } else {
        callFun()
      }
    },
    start_message () {
      this.$set(this, 'tipShow', false)
      this.$emit('start_callback', this.msTime.show)
      setTimeout(() => {
        this.runTime(this.end, this.star, this.end_message, true)
      }, 1)
    },
    end_message () {
      this.msTime.show = false
      if (this.currentTime <= 0) {
        return
      }
      this.$emit('end_callback', this.msTime.show)
    }
  }
}
</script>
